Support formatting JSON

[calvinbrown085]

Currently, I don't believe if you use the JSON encoder, you can format it, it would be awesome if this was the case.

[calvinbrown085]

It could possibly look something like this

refresh_rate: 30 seconds
appenders:
  stdout:
    kind: console
    encoder:
      kind: json
      pattern: "{d(%Y-%m-%d %H:%M:%S)} - {m}{t}{T}{n}"
root:
  level: info
  appenders:
    - stdout

[estk]

@calvinbrown085 still interested in this?

[calvinbrown085]

I am, but my time may be odd the next couple week so if someone wants to pick it up that's fine.

[caoruijuan13]

It will be better to support add custom key when using JSON encoder, it will be able to link Filebeat and ELK Stack directly for analysis.

• Thanks. Alex

[estk]

@Ruijuan-Cao can you give an example?

[caoruijuan13]

Firstly, thanks for your reply, and I'm very sorry to see this so late. For example, I need a new customized key-value "type-xxx“ in log for analysis, I didn't find any guidance document to add a new key, so I tried to pretend like that by this

let str = "hello,test\",\"type\":\"xxx";
info!(target:"app", "{}", str);

but all msg including double quotation marks is treated as message by escape character. And the output is shown below：

{
    "time":"2020-06-04T20:59:19.946833+08:00",
    "message":"hello, test\",\"type\":\"xxx",
    "module_path":"spot::statics::clog",
    ...
}

but what I want is like that：

{
    "time":"2020-06-04T20:59:19.946833+08:00",
    "message":"hello, test",
    "type":"xxx",
    "module_path":"spot::statics::clog",
    ...
}

So, I want to know if there is any way to do this.（Maybe this is a bit stupid requirement🤦‍♀️) Thank you very much.

[calvinbrown085]

Sorry, been away for a while. I still think this would be a great thing to have. Everyone else still interested @estk @Ruijuan-Cao ?

[sw-dev-code]

Any update on this feature?

[estk]

@caoruijuan13 the log crate does not have a notion of structured logging, I would suggest that you use an empty formatter and serialize the json output yourself. Using a separate log target you can filter out your custom serialized logs to a separate appender.

[Dagunov]

Hi! I'm finding evidence that json formatting is supported in closed issues and here, yet there is no support for that in docs and code from stackoverflow itself isn't working.